New data on the genus Cheilosia Meigen (Diptera, Syrphidae) from Central Asia, with descriptions of two new species and a key to the 'group C'.

New information is given on the distribution of Cheilosia Meigen species (Diptera, Syrphidae) in Central Asia, together with a description of two new species. The new species, Cheilosia teneripilosa sp. nov.

Revision of the group (Diptera, Syrphidae).

The phytophagous hoverfly genus Meigen, 1803 (Diptera, Syrphidae), which comprises more than 160 species distributed in Palaearctic and Afrotropical regions, can be differentiated into multiple groups of species that harbor high levels of hidden diversity. In this work, the species group of is revised, providing an illustrated key to species, a detailed discussion on the taxonomic characters and a morphological diagnosis, including also the first data about the preimaginal morphology of this species group. The study includes characteristics of the 13 species of the group, along with the available distributional data.

Two new enigmatic species of the genus Merodon Meigen (Diptera: Syrphidae) from the north-eastern Middle East.

Two new remarkable species of the genus Merodon Meigen (Diptera: Syrphidae) are described from biodiversity hotspots in the Middle East: Merodon eumerusi Vujić, Radenković et Likov sp. n. and Merodon mixtum Vujić, Radenković et Likov sp.

Taxonomic review of the Palaearctic species of the -group (Diptera, Syrphidae).

The Palaearctic species of the group (Diptera: Syrphidae) are revised in this work. The species group belongs to the genus Cheilosia subgenus Taeniocheilosia Oldenberg. One new species is described from north Caucasus, Cheilosia (Taeniocheilosia) circassica Hering is established as a junior synonym of Loew.

Review of the Asian species of the subgenus Neocheilosia Barkalov (Diptera, Syrphidae), with description of new species.

The Asian species of the subgenus Neocheilosia are reviewed. A new species Cheilosia (Neocheilosia) shiranesana Barkalov & Ichige sp. n.

Descriptions of three new species of the genus Cheilosia Meigen from China (Diptera, Syrphidae).

Three species of genus Cheilosia (Diptera, Syrphidae: Eristalinae) from China are described as new to science, Cheilosia bullabucca Barkalov & Ståhls sp. n., C.

Two new species of Syrphidae (Diptera) from Chukotka (Northern Russian Far East).

Two new species, Platycheirus beringiensis sp. n. and Cheilosia chukotana sp.

Two new species of Chrysotus Meigen (Diptera, Dolichopodidae) from Siberia, with a key to the Siberian species.

Two new species from the southern tundra of the Taimyr Peninsula (Russia) are described. Chrysotus tricaudatus Negrobov, Barkalov & Selivanova sp. nov.

A new Platycheirus Le Peletier et Serville, 1828 (Diptera, Syrphidae) species of the manicatus subgroup, from the Taimyr Peninsula (Northern Siberia).

A new species of the genus Platycheirus Le Peletier et Serville, 1828 (Diptera, Syrphidae) is described from the Taimyr Peninsula (North of Krasnoyarsk Region). The new species belongs to the manicatus subgroup, being close to P. groenlandicus Curran, 1927, but differing by the narrower angle of approximation of the eyes (approximately equal 90 degrees) and the presence of short black setae on the ventral side of the mid metatarsus.